1 /* Broadcom NetXtreme-C/E network driver. 2 * 3 * Copyright (c) 2021 Broadcom Inc. 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation. 8 */ 9 #include <linux/kernel.h> 10 #include <linux/errno.h> 11 #include <linux/pci.h> 12 #include <linux/netdevice.h> 13 #include <linux/etherdevice.h> 14 #include <linux/net_tstamp.h> 15 #include <linux/timekeeping.h> 16 #include <linux/ptp_classify.h> 17 #include "bnxt_hsi.h" 18 #include "bnxt.h" 19 #include "bnxt_hwrm.h" 20 #include "bnxt_ptp.h" 21 22 static int bnxt_ptp_cfg_settime(struct bnxt *bp, u64 time) 23 { 24 struct hwrm_func_ptp_cfg_input *req; 25 int rc; 26 27 rc = hwrm_req_init(bp, req, HWRM_FUNC_PTP_CFG); 28 if (rc) 29 return rc; 30 31 req->enables = cpu_to_le16(FUNC_PTP_CFG_REQ_ENABLES_PTP_SET_TIME); 32 req->ptp_set_time = cpu_to_le64(time); 33 return hwrm_req_send(bp, req); 34 } 35 36 int bnxt_ptp_parse(struct sk_buff *skb, u16 *seq_id, u16 *hdr_off) 37 { 38 unsigned int ptp_class; 39 struct ptp_header *hdr; 40 41 ptp_class = ptp_classify_raw(skb); 42 43 switch (ptp_class & PTP_CLASS_VMASK) { 44 case PTP_CLASS_V1: 45 case PTP_CLASS_V2: 46 hdr = ptp_parse_header(skb, ptp_class); 47 if (!hdr) 48 return -EINVAL; 49 50 *hdr_off = (u8 *)hdr - skb->data; 51 *seq_id = ntohs(hdr->sequence_id); 52 return 0; 53 default: 54 return -ERANGE; 55 } 56 } 57 58 static int bnxt_ptp_settime(struct ptp_clock_info *ptp_info, 59 const struct timespec64 *ts) 60 { 61 struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg, 62 ptp_info); 63 u64 ns = timespec64_to_ns(ts); 64 65 if (ptp->bp->fw_cap & BNXT_FW_CAP_PTP_RTC) 66 return bnxt_ptp_cfg_settime(ptp->bp, ns); 67 68 spin_lock_bh(&ptp->ptp_lock); 69 timecounter_init(&ptp->tc, &ptp->cc, ns); 70 spin_unlock_bh(&ptp->ptp_lock); 71 return 0; 72 } 73 74 /* Caller holds ptp_lock */ 75 static int bnxt_refclk_read(struct bnxt *bp, struct ptp_system_timestamp *sts, 76 u64 *ns) 77 { 78 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 79 u32 high_before, high_now, low; 80 81 if (test_bit(BNXT_STATE_IN_FW_RESET, &bp->state)) 82 return -EIO; 83 84 high_before = readl(bp->bar0 + ptp->refclk_mapped_regs[1]); 85 ptp_read_system_prets(sts); 86 low = readl(bp->bar0 + ptp->refclk_mapped_regs[0]); 87 ptp_read_system_postts(sts); 88 high_now = readl(bp->bar0 + ptp->refclk_mapped_regs[1]); 89 if (high_now != high_before) { 90 ptp_read_system_prets(sts); 91 low = readl(bp->bar0 + ptp->refclk_mapped_regs[0]); 92 ptp_read_system_postts(sts); 93 } 94 *ns = ((u64)high_now << 32) | low; 95 96 return 0; 97 } 98 99 static void bnxt_ptp_get_current_time(struct bnxt *bp) 100 { 101 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 102 103 if (!ptp) 104 return; 105 spin_lock_bh(&ptp->ptp_lock); 106 WRITE_ONCE(ptp->old_time, ptp->current_time); 107 bnxt_refclk_read(bp, NULL, &ptp->current_time); 108 spin_unlock_bh(&ptp->ptp_lock); 109 } 110 111 static int bnxt_hwrm_port_ts_query(struct bnxt *bp, u32 flags, u64 *ts) 112 { 113 struct hwrm_port_ts_query_output *resp; 114 struct hwrm_port_ts_query_input *req; 115 int rc; 116 117 rc = hwrm_req_init(bp, req, HWRM_PORT_TS_QUERY); 118 if (rc) 119 return rc; 120 121 req->flags = cpu_to_le32(flags); 122 if ((flags & PORT_TS_QUERY_REQ_FLAGS_PATH) == 123 PORT_TS_QUERY_REQ_FLAGS_PATH_TX) { 124 req->enables = cpu_to_le16(BNXT_PTP_QTS_TX_ENABLES); 125 req->ptp_seq_id = cpu_to_le32(bp->ptp_cfg->tx_seqid); 126 req->ptp_hdr_offset = cpu_to_le16(bp->ptp_cfg->tx_hdr_off); 127 req->ts_req_timeout = cpu_to_le16(BNXT_PTP_QTS_TIMEOUT); 128 } 129 resp = hwrm_req_hold(bp, req); 130 131 rc = hwrm_req_send(bp, req); 132 if (!rc) 133 *ts = le64_to_cpu(resp->ptp_msg_ts); 134 hwrm_req_drop(bp, req); 135 return rc; 136 } 137 138 static int bnxt_ptp_gettimex(struct ptp_clock_info *ptp_info, 139 struct timespec64 *ts, 140 struct ptp_system_timestamp *sts) 141 { 142 struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg, 143 ptp_info); 144 u64 ns, cycles; 145 int rc; 146 147 spin_lock_bh(&ptp->ptp_lock); 148 rc = bnxt_refclk_read(ptp->bp, sts, &cycles); 149 if (rc) { 150 spin_unlock_bh(&ptp->ptp_lock); 151 return rc; 152 } 153 ns = timecounter_cyc2time(&ptp->tc, cycles); 154 spin_unlock_bh(&ptp->ptp_lock); 155 *ts = ns_to_timespec64(ns); 156 157 return 0; 158 } 159 160 /* Caller holds ptp_lock */ 161 void bnxt_ptp_update_current_time(struct bnxt *bp) 162 { 163 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 164 165 bnxt_refclk_read(ptp->bp, NULL, &ptp->current_time); 166 WRITE_ONCE(ptp->old_time, ptp->current_time); 167 } 168 169 static int bnxt_ptp_adjphc(struct bnxt_ptp_cfg *ptp, s64 delta) 170 { 171 struct hwrm_port_mac_cfg_input *req; 172 int rc; 173 174 rc = hwrm_req_init(ptp->bp, req, HWRM_PORT_MAC_CFG); 175 if (rc) 176 return rc; 177 178 req->enables = cpu_to_le32(PORT_MAC_CFG_REQ_ENABLES_PTP_ADJ_PHASE); 179 req->ptp_adj_phase = cpu_to_le64(delta); 180 181 rc = hwrm_req_send(ptp->bp, req); 182 if (rc) { 183 netdev_err(ptp->bp->dev, "ptp adjphc failed. rc = %x\n", rc); 184 } else { 185 spin_lock_bh(&ptp->ptp_lock); 186 bnxt_ptp_update_current_time(ptp->bp); 187 spin_unlock_bh(&ptp->ptp_lock); 188 } 189 190 return rc; 191 } 192 193 static int bnxt_ptp_adjtime(struct ptp_clock_info *ptp_info, s64 delta) 194 { 195 struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg, 196 ptp_info); 197 198 if (ptp->bp->fw_cap & BNXT_FW_CAP_PTP_RTC) 199 return bnxt_ptp_adjphc(ptp, delta); 200 201 spin_lock_bh(&ptp->ptp_lock); 202 timecounter_adjtime(&ptp->tc, delta); 203 spin_unlock_bh(&ptp->ptp_lock); 204 return 0; 205 } 206 207 static int bnxt_ptp_adjfreq(struct ptp_clock_info *ptp_info, s32 ppb) 208 { 209 struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg, 210 ptp_info); 211 struct hwrm_port_mac_cfg_input *req; 212 struct bnxt *bp = ptp->bp; 213 int rc; 214 215 rc = hwrm_req_init(bp, req, HWRM_PORT_MAC_CFG); 216 if (rc) 217 return rc; 218 219 req->ptp_freq_adj_ppb = cpu_to_le32(ppb); 220 req->enables = cpu_to_le32(PORT_MAC_CFG_REQ_ENABLES_PTP_FREQ_ADJ_PPB); 221 rc = hwrm_req_send(ptp->bp, req); 222 if (rc) 223 netdev_err(ptp->bp->dev, 224 "ptp adjfreq failed. rc = %d\n", rc); 225 return rc; 226 } 227 228 void bnxt_ptp_pps_event(struct bnxt *bp, u32 data1, u32 data2) 229 { 230 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 231 struct ptp_clock_event event; 232 u64 ns, pps_ts; 233 234 pps_ts = EVENT_PPS_TS(data2, data1); 235 spin_lock_bh(&ptp->ptp_lock); 236 ns = timecounter_cyc2time(&ptp->tc, pps_ts); 237 spin_unlock_bh(&ptp->ptp_lock); 238 239 switch (EVENT_DATA2_PPS_EVENT_TYPE(data2)) { 240 case ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_EVENT_TYPE_INTERNAL: 241 event.pps_times.ts_real = ns_to_timespec64(ns); 242 event.type = PTP_CLOCK_PPSUSR; 243 event.index = EVENT_DATA2_PPS_PIN_NUM(data2); 244 break; 245 case ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_EVENT_TYPE_EXTERNAL: 246 event.timestamp = ns; 247 event.type = PTP_CLOCK_EXTTS; 248 event.index = EVENT_DATA2_PPS_PIN_NUM(data2); 249 break; 250 } 251 252 ptp_clock_event(bp->ptp_cfg->ptp_clock, &event); 253 } 254 255 static int bnxt_ptp_cfg_pin(struct bnxt *bp, u8 pin, u8 usage) 256 { 257 struct hwrm_func_ptp_pin_cfg_input *req; 258 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 259 u8 state = usage != BNXT_PPS_PIN_NONE; 260 u8 *pin_state, *pin_usg; 261 u32 enables; 262 int rc; 263 264 if (!TSIO_PIN_VALID(pin)) { 265 netdev_err(ptp->bp->dev, "1PPS: Invalid pin. Check pin-function configuration\n"); 266 return -EOPNOTSUPP; 267 } 268 269 rc = hwrm_req_init(ptp->bp, req, HWRM_FUNC_PTP_PIN_CFG); 270 if (rc) 271 return rc; 272 273 enables = (FUNC_PTP_PIN_CFG_REQ_ENABLES_PIN0_STATE | 274 FUNC_PTP_PIN_CFG_REQ_ENABLES_PIN0_USAGE) << (pin * 2); 275 req->enables = cpu_to_le32(enables); 276 277 pin_state = &req->pin0_state; 278 pin_usg = &req->pin0_usage; 279 280 *(pin_state + (pin * 2)) = state; 281 *(pin_usg + (pin * 2)) = usage; 282 283 rc = hwrm_req_send(ptp->bp, req); 284 if (rc) 285 return rc; 286 287 ptp->pps_info.pins[pin].usage = usage; 288 ptp->pps_info.pins[pin].state = state; 289 290 return 0; 291 } 292 293 static int bnxt_ptp_cfg_event(struct bnxt *bp, u8 event) 294 { 295 struct hwrm_func_ptp_cfg_input *req; 296 int rc; 297 298 rc = hwrm_req_init(bp, req, HWRM_FUNC_PTP_CFG); 299 if (rc) 300 return rc; 301 302 req->enables = cpu_to_le16(FUNC_PTP_CFG_REQ_ENABLES_PTP_PPS_EVENT); 303 req->ptp_pps_event = event; 304 return hwrm_req_send(bp, req); 305 } 306 307 void bnxt_ptp_cfg_tstamp_filters(struct bnxt *bp) 308 { 309 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 310 struct hwrm_port_mac_cfg_input *req; 311 312 if (!ptp || !ptp->tstamp_filters) 313 return; 314 315 if (hwrm_req_init(bp, req, HWRM_PORT_MAC_CFG)) 316 goto out; 317 318 if (!(bp->fw_cap & BNXT_FW_CAP_RX_ALL_PKT_TS) && (ptp->tstamp_filters & 319 (PORT_MAC_CFG_REQ_FLAGS_ALL_RX_TS_CAPTURE_ENABLE | 320 PORT_MAC_CFG_REQ_FLAGS_ALL_RX_TS_CAPTURE_DISABLE))) { 321 ptp->tstamp_filters &= ~(PORT_MAC_CFG_REQ_FLAGS_ALL_RX_TS_CAPTURE_ENABLE | 322 PORT_MAC_CFG_REQ_FLAGS_ALL_RX_TS_CAPTURE_DISABLE); 323 netdev_warn(bp->dev, "Unsupported FW for all RX pkts timestamp filter\n"); 324 } 325 326 req->flags = cpu_to_le32(ptp->tstamp_filters); 327 req->enables = cpu_to_le32(PORT_MAC_CFG_REQ_ENABLES_RX_TS_CAPTURE_PTP_MSG_TYPE); 328 req->rx_ts_capture_ptp_msg_type = cpu_to_le16(ptp->rxctl); 329 330 if (!hwrm_req_send(bp, req)) { 331 bp->ptp_all_rx_tstamp = !!(ptp->tstamp_filters & 332 PORT_MAC_CFG_REQ_FLAGS_ALL_RX_TS_CAPTURE_ENABLE); 333 return; 334 } 335 ptp->tstamp_filters = 0; 336 out: 337 bp->ptp_all_rx_tstamp = 0; 338 netdev_warn(bp->dev, "Failed to configure HW packet timestamp filters\n"); 339 } 340 341 void bnxt_ptp_reapply_pps(struct bnxt *bp) 342 { 343 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 344 struct bnxt_pps *pps; 345 u32 pin = 0; 346 int rc; 347 348 if (!ptp || !(bp->fw_cap & BNXT_FW_CAP_PTP_PPS) || 349 !(ptp->ptp_info.pin_config)) 350 return; 351 pps = &ptp->pps_info; 352 for (pin = 0; pin < BNXT_MAX_TSIO_PINS; pin++) { 353 if (pps->pins[pin].state) { 354 rc = bnxt_ptp_cfg_pin(bp, pin, pps->pins[pin].usage); 355 if (!rc && pps->pins[pin].event) 356 rc = bnxt_ptp_cfg_event(bp, 357 pps->pins[pin].event); 358 if (rc) 359 netdev_err(bp->dev, "1PPS: Failed to configure pin%d\n", 360 pin); 361 } 362 } 363 } 364 365 static int bnxt_get_target_cycles(struct bnxt_ptp_cfg *ptp, u64 target_ns, 366 u64 *cycles_delta) 367 { 368 u64 cycles_now; 369 u64 nsec_now, nsec_delta; 370 int rc; 371 372 spin_lock_bh(&ptp->ptp_lock); 373 rc = bnxt_refclk_read(ptp->bp, NULL, &cycles_now); 374 if (rc) { 375 spin_unlock_bh(&ptp->ptp_lock); 376 return rc; 377 } 378 nsec_now = timecounter_cyc2time(&ptp->tc, cycles_now); 379 spin_unlock_bh(&ptp->ptp_lock); 380 381 nsec_delta = target_ns - nsec_now; 382 *cycles_delta = div64_u64(nsec_delta << ptp->cc.shift, ptp->cc.mult); 383 return 0; 384 } 385 386 static int bnxt_ptp_perout_cfg(struct bnxt_ptp_cfg *ptp, 387 struct ptp_clock_request *rq) 388 { 389 struct hwrm_func_ptp_cfg_input *req; 390 struct bnxt *bp = ptp->bp; 391 struct timespec64 ts; 392 u64 target_ns, delta; 393 u16 enables; 394 int rc; 395 396 ts.tv_sec = rq->perout.start.sec; 397 ts.tv_nsec = rq->perout.start.nsec; 398 target_ns = timespec64_to_ns(&ts); 399 400 rc = bnxt_get_target_cycles(ptp, target_ns, &delta); 401 if (rc) 402 return rc; 403 404 rc = hwrm_req_init(bp, req, HWRM_FUNC_PTP_CFG); 405 if (rc) 406 return rc; 407 408 enables = FUNC_PTP_CFG_REQ_ENABLES_PTP_FREQ_ADJ_EXT_PERIOD | 409 FUNC_PTP_CFG_REQ_ENABLES_PTP_FREQ_ADJ_EXT_UP | 410 FUNC_PTP_CFG_REQ_ENABLES_PTP_FREQ_ADJ_EXT_PHASE; 411 req->enables = cpu_to_le16(enables); 412 req->ptp_pps_event = 0; 413 req->ptp_freq_adj_dll_source = 0; 414 req->ptp_freq_adj_dll_phase = 0; 415 req->ptp_freq_adj_ext_period = cpu_to_le32(NSEC_PER_SEC); 416 req->ptp_freq_adj_ext_up = 0; 417 req->ptp_freq_adj_ext_phase_lower = cpu_to_le32(delta); 418 419 return hwrm_req_send(bp, req); 420 } 421 422 static int bnxt_ptp_enable(struct ptp_clock_info *ptp_info, 423 struct ptp_clock_request *rq, int on) 424 { 425 struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg, 426 ptp_info); 427 struct bnxt *bp = ptp->bp; 428 int pin_id; 429 int rc; 430 431 switch (rq->type) { 432 case PTP_CLK_REQ_EXTTS: 433 /* Configure an External PPS IN */ 434 pin_id = ptp_find_pin(ptp->ptp_clock, PTP_PF_EXTTS, 435 rq->extts.index); 436 if (!TSIO_PIN_VALID(pin_id)) 437 return -EOPNOTSUPP; 438 if (!on) 439 break; 440 rc = bnxt_ptp_cfg_pin(bp, pin_id, BNXT_PPS_PIN_PPS_IN); 441 if (rc) 442 return rc; 443 rc = bnxt_ptp_cfg_event(bp, BNXT_PPS_EVENT_EXTERNAL); 444 if (!rc) 445 ptp->pps_info.pins[pin_id].event = BNXT_PPS_EVENT_EXTERNAL; 446 return rc; 447 case PTP_CLK_REQ_PEROUT: 448 /* Configure a Periodic PPS OUT */ 449 pin_id = ptp_find_pin(ptp->ptp_clock, PTP_PF_PEROUT, 450 rq->perout.index); 451 if (!TSIO_PIN_VALID(pin_id)) 452 return -EOPNOTSUPP; 453 if (!on) 454 break; 455 456 rc = bnxt_ptp_cfg_pin(bp, pin_id, BNXT_PPS_PIN_PPS_OUT); 457 if (!rc) 458 rc = bnxt_ptp_perout_cfg(ptp, rq); 459 460 return rc; 461 case PTP_CLK_REQ_PPS: 462 /* Configure PHC PPS IN */ 463 rc = bnxt_ptp_cfg_pin(bp, 0, BNXT_PPS_PIN_PPS_IN); 464 if (rc) 465 return rc; 466 rc = bnxt_ptp_cfg_event(bp, BNXT_PPS_EVENT_INTERNAL); 467 if (!rc) 468 ptp->pps_info.pins[0].event = BNXT_PPS_EVENT_INTERNAL; 469 return rc; 470 default: 471 netdev_err(ptp->bp->dev, "Unrecognized PIN function\n"); 472 return -EOPNOTSUPP; 473 } 474 475 return bnxt_ptp_cfg_pin(bp, pin_id, BNXT_PPS_PIN_NONE); 476 } 477 478 static int bnxt_hwrm_ptp_cfg(struct bnxt *bp) 479 { 480 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 481 u32 flags = 0; 482 int rc = 0; 483 484 switch (ptp->rx_filter) { 485 case HWTSTAMP_FILTER_ALL: 486 flags = PORT_MAC_CFG_REQ_FLAGS_ALL_RX_TS_CAPTURE_ENABLE; 487 break; 488 case HWTSTAMP_FILTER_NONE: 489 flags = PORT_MAC_CFG_REQ_FLAGS_PTP_RX_TS_CAPTURE_DISABLE; 490 if (bp->fw_cap & BNXT_FW_CAP_RX_ALL_PKT_TS) 491 flags |= PORT_MAC_CFG_REQ_FLAGS_ALL_RX_TS_CAPTURE_DISABLE; 492 break; 493 case HWTSTAMP_FILTER_PTP_V2_EVENT: 494 case HWTSTAMP_FILTER_PTP_V2_SYNC: 495 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: 496 flags = PORT_MAC_CFG_REQ_FLAGS_PTP_RX_TS_CAPTURE_ENABLE; 497 break; 498 } 499 500 if (ptp->tx_tstamp_en) 501 flags |= PORT_MAC_CFG_REQ_FLAGS_PTP_TX_TS_CAPTURE_ENABLE; 502 else 503 flags |= PORT_MAC_CFG_REQ_FLAGS_PTP_TX_TS_CAPTURE_DISABLE; 504 505 ptp->tstamp_filters = flags; 506 507 if (netif_running(bp->dev)) { 508 rc = bnxt_close_nic(bp, false, false); 509 if (!rc) 510 rc = bnxt_open_nic(bp, false, false); 511 if (!rc && !ptp->tstamp_filters) 512 rc = -EIO; 513 } 514 515 return rc; 516 } 517 518 int bnxt_hwtstamp_set(struct net_device *dev, struct ifreq *ifr) 519 { 520 struct bnxt *bp = netdev_priv(dev); 521 struct hwtstamp_config stmpconf; 522 struct bnxt_ptp_cfg *ptp; 523 u16 old_rxctl; 524 int old_rx_filter, rc; 525 u8 old_tx_tstamp_en; 526 527 ptp = bp->ptp_cfg; 528 if (!ptp) 529 return -EOPNOTSUPP; 530 531 if (copy_from_user(&stmpconf, ifr->ifr_data, sizeof(stmpconf))) 532 return -EFAULT; 533 534 if (stmpconf.tx_type != HWTSTAMP_TX_ON && 535 stmpconf.tx_type != HWTSTAMP_TX_OFF) 536 return -ERANGE; 537 538 old_rx_filter = ptp->rx_filter; 539 old_rxctl = ptp->rxctl; 540 old_tx_tstamp_en = ptp->tx_tstamp_en; 541 switch (stmpconf.rx_filter) { 542 case HWTSTAMP_FILTER_NONE: 543 ptp->rxctl = 0; 544 ptp->rx_filter = HWTSTAMP_FILTER_NONE; 545 break; 546 case HWTSTAMP_FILTER_ALL: 547 if (bp->fw_cap & BNXT_FW_CAP_RX_ALL_PKT_TS) { 548 ptp->rx_filter = HWTSTAMP_FILTER_ALL; 549 break; 550 } 551 return -EOPNOTSUPP; 552 case HWTSTAMP_FILTER_PTP_V2_EVENT: 553 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: 554 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: 555 ptp->rxctl = BNXT_PTP_MSG_EVENTS; 556 ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT; 557 break; 558 case HWTSTAMP_FILTER_PTP_V2_SYNC: 559 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: 560 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: 561 ptp->rxctl = BNXT_PTP_MSG_SYNC; 562 ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_SYNC; 563 break; 564 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: 565 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: 566 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: 567 ptp->rxctl = BNXT_PTP_MSG_DELAY_REQ; 568 ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_DELAY_REQ; 569 break; 570 default: 571 return -ERANGE; 572 } 573 574 if (stmpconf.tx_type == HWTSTAMP_TX_ON) 575 ptp->tx_tstamp_en = 1; 576 else 577 ptp->tx_tstamp_en = 0; 578 579 rc = bnxt_hwrm_ptp_cfg(bp); 580 if (rc) 581 goto ts_set_err; 582 583 stmpconf.rx_filter = ptp->rx_filter; 584 return copy_to_user(ifr->ifr_data, &stmpconf, sizeof(stmpconf)) ? 585 -EFAULT : 0; 586 587 ts_set_err: 588 ptp->rx_filter = old_rx_filter; 589 ptp->rxctl = old_rxctl; 590 ptp->tx_tstamp_en = old_tx_tstamp_en; 591 return rc; 592 } 593 594 int bnxt_hwtstamp_get(struct net_device *dev, struct ifreq *ifr) 595 { 596 struct bnxt *bp = netdev_priv(dev); 597 struct hwtstamp_config stmpconf; 598 struct bnxt_ptp_cfg *ptp; 599 600 ptp = bp->ptp_cfg; 601 if (!ptp) 602 return -EOPNOTSUPP; 603 604 stmpconf.flags = 0; 605 stmpconf.tx_type = ptp->tx_tstamp_en ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF; 606 607 stmpconf.rx_filter = ptp->rx_filter; 608 return copy_to_user(ifr->ifr_data, &stmpconf, sizeof(stmpconf)) ? 609 -EFAULT : 0; 610 } 611 612 static int bnxt_map_regs(struct bnxt *bp, u32 *reg_arr, int count, int reg_win) 613 { 614 u32 reg_base = *reg_arr & BNXT_GRC_BASE_MASK; 615 u32 win_off; 616 int i; 617 618 for (i = 0; i < count; i++) { 619 if ((reg_arr[i] & BNXT_GRC_BASE_MASK) != reg_base) 620 return -ERANGE; 621 } 622 win_off = BNXT_GRCPF_REG_WINDOW_BASE_OUT + (reg_win - 1) * 4; 623 writel(reg_base, bp->bar0 + win_off); 624 return 0; 625 } 626 627 static int bnxt_map_ptp_regs(struct bnxt *bp) 628 { 629 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 630 u32 *reg_arr; 631 int rc, i; 632 633 reg_arr = ptp->refclk_regs; 634 if (bp->flags & BNXT_FLAG_CHIP_P5) { 635 rc = bnxt_map_regs(bp, reg_arr, 2, BNXT_PTP_GRC_WIN); 636 if (rc) 637 return rc; 638 for (i = 0; i < 2; i++) 639 ptp->refclk_mapped_regs[i] = BNXT_PTP_GRC_WIN_BASE + 640 (ptp->refclk_regs[i] & BNXT_GRC_OFFSET_MASK); 641 return 0; 642 } 643 return -ENODEV; 644 } 645 646 static void bnxt_unmap_ptp_regs(struct bnxt *bp) 647 { 648 writel(0, bp->bar0 + BNXT_GRCPF_REG_WINDOW_BASE_OUT + 649 (BNXT_PTP_GRC_WIN - 1) * 4); 650 } 651 652 static u64 bnxt_cc_read(const struct cyclecounter *cc) 653 { 654 struct bnxt_ptp_cfg *ptp = container_of(cc, struct bnxt_ptp_cfg, cc); 655 u64 ns = 0; 656 657 bnxt_refclk_read(ptp->bp, NULL, &ns); 658 return ns; 659 } 660 661 static void bnxt_stamp_tx_skb(struct bnxt *bp, struct sk_buff *skb) 662 { 663 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 664 struct skb_shared_hwtstamps timestamp; 665 u64 ts = 0, ns = 0; 666 int rc; 667 668 rc = bnxt_hwrm_port_ts_query(bp, PORT_TS_QUERY_REQ_FLAGS_PATH_TX, &ts); 669 if (!rc) { 670 memset(×tamp, 0, sizeof(timestamp)); 671 spin_lock_bh(&ptp->ptp_lock); 672 ns = timecounter_cyc2time(&ptp->tc, ts); 673 spin_unlock_bh(&ptp->ptp_lock); 674 timestamp.hwtstamp = ns_to_ktime(ns); 675 skb_tstamp_tx(ptp->tx_skb, ×tamp); 676 } else { 677 netdev_err(bp->dev, "TS query for TX timer failed rc = %x\n", 678 rc); 679 } 680 681 dev_kfree_skb_any(ptp->tx_skb); 682 ptp->tx_skb = NULL; 683 atomic_inc(&ptp->tx_avail); 684 } 685 686 static long bnxt_ptp_ts_aux_work(struct ptp_clock_info *ptp_info) 687 { 688 struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg, 689 ptp_info); 690 unsigned long now = jiffies; 691 struct bnxt *bp = ptp->bp; 692 693 if (ptp->tx_skb) 694 bnxt_stamp_tx_skb(bp, ptp->tx_skb); 695 696 if (!time_after_eq(now, ptp->next_period)) 697 return ptp->next_period - now; 698 699 bnxt_ptp_get_current_time(bp); 700 ptp->next_period = now + HZ; 701 if (time_after_eq(now, ptp->next_overflow_check)) { 702 spin_lock_bh(&ptp->ptp_lock); 703 timecounter_read(&ptp->tc); 704 spin_unlock_bh(&ptp->ptp_lock); 705 ptp->next_overflow_check = now + BNXT_PHC_OVERFLOW_PERIOD; 706 } 707 return HZ; 708 } 709 710 int bnxt_get_tx_ts_p5(struct bnxt *bp, struct sk_buff *skb) 711 { 712 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 713 714 if (ptp->tx_skb) { 715 netdev_err(bp->dev, "deferring skb:one SKB is still outstanding\n"); 716 return -EBUSY; 717 } 718 ptp->tx_skb = skb; 719 ptp_schedule_worker(ptp->ptp_clock, 0); 720 return 0; 721 } 722 723 int bnxt_get_rx_ts_p5(struct bnxt *bp, u64 *ts, u32 pkt_ts) 724 { 725 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 726 u64 time; 727 728 if (!ptp) 729 return -ENODEV; 730 731 BNXT_READ_TIME64(ptp, time, ptp->old_time); 732 *ts = (time & BNXT_HI_TIMER_MASK) | pkt_ts; 733 if (pkt_ts < (time & BNXT_LO_TIMER_MASK)) 734 *ts += BNXT_LO_TIMER_MASK + 1; 735 736 return 0; 737 } 738 739 static const struct ptp_clock_info bnxt_ptp_caps = { 740 .owner = THIS_MODULE, 741 .name = "bnxt clock", 742 .max_adj = BNXT_MAX_PHC_DRIFT, 743 .n_alarm = 0, 744 .n_ext_ts = 0, 745 .n_per_out = 0, 746 .n_pins = 0, 747 .pps = 0, 748 .adjfreq = bnxt_ptp_adjfreq, 749 .adjtime = bnxt_ptp_adjtime, 750 .do_aux_work = bnxt_ptp_ts_aux_work, 751 .gettimex64 = bnxt_ptp_gettimex, 752 .settime64 = bnxt_ptp_settime, 753 .enable = bnxt_ptp_enable, 754 }; 755 756 static int bnxt_ptp_verify(struct ptp_clock_info *ptp_info, unsigned int pin, 757 enum ptp_pin_function func, unsigned int chan) 758 { 759 struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg, 760 ptp_info); 761 /* Allow only PPS pin function configuration */ 762 if (ptp->pps_info.pins[pin].usage <= BNXT_PPS_PIN_PPS_OUT && 763 func != PTP_PF_PHYSYNC) 764 return 0; 765 else 766 return -EOPNOTSUPP; 767 } 768 769 static int bnxt_ptp_pps_init(struct bnxt *bp) 770 { 771 struct hwrm_func_ptp_pin_qcfg_output *resp; 772 struct hwrm_func_ptp_pin_qcfg_input *req; 773 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 774 struct ptp_clock_info *ptp_info; 775 struct bnxt_pps *pps_info; 776 u8 *pin_usg; 777 u32 i, rc; 778 779 /* Query current/default PIN CFG */ 780 rc = hwrm_req_init(bp, req, HWRM_FUNC_PTP_PIN_QCFG); 781 if (rc) 782 return rc; 783 784 resp = hwrm_req_hold(bp, req); 785 rc = hwrm_req_send(bp, req); 786 if (rc || !resp->num_pins) { 787 hwrm_req_drop(bp, req); 788 return -EOPNOTSUPP; 789 } 790 791 ptp_info = &ptp->ptp_info; 792 pps_info = &ptp->pps_info; 793 pps_info->num_pins = resp->num_pins; 794 ptp_info->n_pins = pps_info->num_pins; 795 ptp_info->pin_config = kcalloc(ptp_info->n_pins, 796 sizeof(*ptp_info->pin_config), 797 GFP_KERNEL); 798 if (!ptp_info->pin_config) { 799 hwrm_req_drop(bp, req); 800 return -ENOMEM; 801 } 802 803 /* Report the TSIO capability to kernel */ 804 pin_usg = &resp->pin0_usage; 805 for (i = 0; i < pps_info->num_pins; i++, pin_usg++) { 806 snprintf(ptp_info->pin_config[i].name, 807 sizeof(ptp_info->pin_config[i].name), "bnxt_pps%d", i); 808 ptp_info->pin_config[i].index = i; 809 ptp_info->pin_config[i].chan = i; 810 if (*pin_usg == BNXT_PPS_PIN_PPS_IN) 811 ptp_info->pin_config[i].func = PTP_PF_EXTTS; 812 else if (*pin_usg == BNXT_PPS_PIN_PPS_OUT) 813 ptp_info->pin_config[i].func = PTP_PF_PEROUT; 814 else 815 ptp_info->pin_config[i].func = PTP_PF_NONE; 816 817 pps_info->pins[i].usage = *pin_usg; 818 } 819 hwrm_req_drop(bp, req); 820 821 /* Only 1 each of ext_ts and per_out pins is available in HW */ 822 ptp_info->n_ext_ts = 1; 823 ptp_info->n_per_out = 1; 824 ptp_info->pps = 1; 825 ptp_info->verify = bnxt_ptp_verify; 826 827 return 0; 828 } 829 830 static bool bnxt_pps_config_ok(struct bnxt *bp) 831 { 832 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 833 834 return !(bp->fw_cap & BNXT_FW_CAP_PTP_PPS) == !ptp->ptp_info.pin_config; 835 } 836 837 static void bnxt_ptp_timecounter_init(struct bnxt *bp, bool init_tc) 838 { 839 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 840 841 if (!ptp->ptp_clock) { 842 memset(&ptp->cc, 0, sizeof(ptp->cc)); 843 ptp->cc.read = bnxt_cc_read; 844 ptp->cc.mask = CYCLECOUNTER_MASK(48); 845 ptp->cc.shift = 0; 846 ptp->cc.mult = 1; 847 ptp->next_overflow_check = jiffies + BNXT_PHC_OVERFLOW_PERIOD; 848 } 849 if (init_tc) 850 timecounter_init(&ptp->tc, &ptp->cc, ktime_to_ns(ktime_get_real())); 851 } 852 853 /* Caller holds ptp_lock */ 854 void bnxt_ptp_rtc_timecounter_init(struct bnxt_ptp_cfg *ptp, u64 ns) 855 { 856 timecounter_init(&ptp->tc, &ptp->cc, ns); 857 /* For RTC, cycle_last must be in sync with the timecounter value. */ 858 ptp->tc.cycle_last = ns & ptp->cc.mask; 859 } 860 861 int bnxt_ptp_init_rtc(struct bnxt *bp, bool phc_cfg) 862 { 863 struct timespec64 tsp; 864 u64 ns; 865 int rc; 866 867 if (!bp->ptp_cfg || !(bp->fw_cap & BNXT_FW_CAP_PTP_RTC)) 868 return -ENODEV; 869 870 if (!phc_cfg) { 871 ktime_get_real_ts64(&tsp); 872 ns = timespec64_to_ns(&tsp); 873 rc = bnxt_ptp_cfg_settime(bp, ns); 874 if (rc) 875 return rc; 876 } else { 877 rc = bnxt_hwrm_port_ts_query(bp, PORT_TS_QUERY_REQ_FLAGS_CURRENT_TIME, &ns); 878 if (rc) 879 return rc; 880 } 881 spin_lock_bh(&bp->ptp_cfg->ptp_lock); 882 bnxt_ptp_rtc_timecounter_init(bp->ptp_cfg, ns); 883 spin_unlock_bh(&bp->ptp_cfg->ptp_lock); 884 885 return 0; 886 } 887 888 static void bnxt_ptp_free(struct bnxt *bp) 889 { 890 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 891 892 if (ptp->ptp_clock) { 893 ptp_clock_unregister(ptp->ptp_clock); 894 ptp->ptp_clock = NULL; 895 kfree(ptp->ptp_info.pin_config); 896 ptp->ptp_info.pin_config = NULL; 897 } 898 } 899 900 int bnxt_ptp_init(struct bnxt *bp, bool phc_cfg) 901 { 902 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 903 int rc; 904 905 if (!ptp) 906 return 0; 907 908 rc = bnxt_map_ptp_regs(bp); 909 if (rc) 910 return rc; 911 912 if (ptp->ptp_clock && bnxt_pps_config_ok(bp)) 913 return 0; 914 915 bnxt_ptp_free(bp); 916 917 atomic_set(&ptp->tx_avail, BNXT_MAX_TX_TS); 918 spin_lock_init(&ptp->ptp_lock); 919 920 if (bp->fw_cap & BNXT_FW_CAP_PTP_RTC) { 921 bnxt_ptp_timecounter_init(bp, false); 922 rc = bnxt_ptp_init_rtc(bp, phc_cfg); 923 if (rc) 924 goto out; 925 } else { 926 bnxt_ptp_timecounter_init(bp, true); 927 } 928 929 ptp->ptp_info = bnxt_ptp_caps; 930 if ((bp->fw_cap & BNXT_FW_CAP_PTP_PPS)) { 931 if (bnxt_ptp_pps_init(bp)) 932 netdev_err(bp->dev, "1pps not initialized, continuing without 1pps support\n"); 933 } 934 ptp->ptp_clock = ptp_clock_register(&ptp->ptp_info, &bp->pdev->dev); 935 if (IS_ERR(ptp->ptp_clock)) { 936 int err = PTR_ERR(ptp->ptp_clock); 937 938 ptp->ptp_clock = NULL; 939 rc = err; 940 goto out; 941 } 942 if (bp->flags & BNXT_FLAG_CHIP_P5) { 943 spin_lock_bh(&ptp->ptp_lock); 944 bnxt_refclk_read(bp, NULL, &ptp->current_time); 945 WRITE_ONCE(ptp->old_time, ptp->current_time); 946 spin_unlock_bh(&ptp->ptp_lock); 947 ptp_schedule_worker(ptp->ptp_clock, 0); 948 } 949 return 0; 950 951 out: 952 bnxt_ptp_free(bp); 953 bnxt_unmap_ptp_regs(bp); 954 return rc; 955 } 956 957 void bnxt_ptp_clear(struct bnxt *bp) 958 { 959 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 960 961 if (!ptp) 962 return; 963 964 if (ptp->ptp_clock) 965 ptp_clock_unregister(ptp->ptp_clock); 966 967 ptp->ptp_clock = NULL; 968 kfree(ptp->ptp_info.pin_config); 969 ptp->ptp_info.pin_config = NULL; 970 971 if (ptp->tx_skb) { 972 dev_kfree_skb_any(ptp->tx_skb); 973 ptp->tx_skb = NULL; 974 } 975 bnxt_unmap_ptp_regs(bp); 976 } 977